<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">
		*{
			margin: 0px;
			padding: 0px;
		}
		li{
			list-style:none;
		}
		.box{
			width: 1260px;
			height: 260px;
			margin: 100px auto;
			overflow: hidden;
		}
		ul{
			width: 1280px;
			height: 260px;
			background: #fff url() 0 0 no-repeat;
		}
		li{
			width: 180px;
			height: 260px;
			background: #fff url(./1.jpg) 0 0 no-repeat;
			float: left;
			background-position: center;
		}
	</style>
	<script type="text/javascript"src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
	<script type="text/javascript">
		$(function  () {
			
			$('li').hover(function() {
				$(this).stop().animate({width:'400px'}, 300).siblings().stop().animate({width:'143'}, 300);
			}, function() {
				$('li').stop().animate({width:'180px'}, 300);
			});

		})
	</script>
</head>
<body>
	<div class="box">
		<ul>
			<li style="background: #fff url(./1.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./2.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./3.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./4.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./5.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./6.jpg) 0 0 no-repeat;background-position: center;"></li>
			<li style="background: #fff url(./7.jpg) 0 0 no-repeat;background-position: center;"></li>
		</ul>
	</div>
</body>
</html>